Method of laying roofing.



No. 840,103. PATENTED JAN. 1, 1907. R. W. BIRD.

-METHOD OF LAYING ROOFING.

APPLICATION FILED FEB. 24,1906.

of the UNITED STATES PATENT REGINALD W. sun), or

FLINTKOTE oFFioE.

NEW JERSEY, A CORPORATION on. NEW JERSEY.

M THOD OF LAYING ROOFING.

Specification of Letters Patent Patented Jan. 1, 1907.

Application filed February 24,1906. Serial No. 302,726.

To (all n/mm, it may concern:

Be it known oston, in the county Massachusetts, have invented certainnew and useful ln'iprovements in Methods of Laying Roofing, of Whichthefollowing is a speci fication.

This invention has relation to roofing. Roofing materials haveheretofore been constructed of a sheet of felt or equivalent materialsaturated. or impregnated with a fine sand flint, or equivon the otherface with a layer of waterproofing compound. In laying such roofing ithas been customary to place roof with the coating of waterproofingcompound next to the boards and with the layer of flint, sand, or gravelexposed to the atmosphere. In roofing a building it is customary to useboards, which are laid side by side upon the supporting-beams, and asmuch of the lumber is used in a comparutively green state and before ithas been sulliciently dried there is present in the board a quantity ofsap or resinous substance, according to the kind of wood of which theboards are formed. In laying the reeling material upon such boards withthe smooth surface of the sheet in contact with the boards the sheetadheres to the surface of the board and prevents the escape of moisture,and therefore prevents the board from drying, and as a consequence theboards soon rot and the roof quickly deteriorates. Where the roof isformed of resinous woods a still more serious result ensues,particularly in warm climates, for the heating of causes the resinoussap to collect on the surface of the boards. Since the waterproofingcompound used for impregnating the roofing sheets are composed ofasphalt or similar materials, for which a resinous sap containing pitchand turpentine is a solvent, the latter eat into the sheet anddestroyit. l have found this to be true from myown experience, for Ihave seen roofs (under the conditions de scribed) in which largeportions of the sheet Were eaten away like sores. I have found thatthese evils may be overcome or prethat 1, REGINALD W. BIRD, of vented bylaying the sheet upon the supporting-boards the roofing-strips with theof Suflolkandfitate of flint-coated surface of the sheets next to thesheets are=laid wooden boards. When -the in this way, an air-space isleft between the sheet and the board for the escape of moisture and.forthe ventilation of thes ace. The coating of flint or sand holds thebody of the sheet out of contact with the board and prevents theresinous sap from injuring the sheet. .I have demonstrated that byplacing the sheet as described I am able to prevent the rapid rotting ofthe boards which support the sheet and also prevent the deterioration ofthe sheets and save them from the attacks of the resinous saps in theboards.

Referring to the 'drawings, Figure 1 r epresents in perspective View aportion of roof laid in accordance with my invention. l ig.

represents a magnified section through one of the boards and the roofingmaterial thereon.

Referring to said drawings, a 0. im ijicatc the beams of aroof, uponwhich are laid boards I) I). These boards are preferably laid with smallcracks or spaces between them, although this not necessary, as theshrinkage of the board is sufficient to form these spaces.

c 0 represent strips of sheets of insulating compound. 'lhese sheets arepreferably formed with a body portion 3, of wool, felt, or equivalentmaterial, which is saturated orimpregnatcd with wa erproofing compound,

having as its base asphalting or an analogous substance. The faces ofthe sheet are coated with layers 4 of the waterproofing compound. .lhelayer I; is coated with a layer of granular material- '--such as sand,flint, gravel,

or the like--\\'hercas the layer 4 is preferably lightly coated withtale 7 or similar material to prevent the convolutions from stickingtogether when the strips are rolled together. in Fig. 2 it will be seenthat by arranging the roofing-strip c with the coating 6, of flint orsand, next to the boards I) there is lefta space to which air may haveaccess to carry oil the moisture of the drying boards for the otherpurposes hereinbefore set forth.

Whatl claim is- The herein-described method of laying ing, materialconskting oi a fibrous body iniprcgnzitcd with mt erproohng (:mnpound,mid having on one face a layer of non-abs01? ient granular JllaLtOlizLiand 'on the other face waturprouiiug compound, and laying said stripsupon said foundation of boards iuoiing which consists in preparingafounda- Lion of boards, taking strips 01' sheets of r001 1 intosbiniuny whereof I. have ail'ixud my signature in. presence 01" twowitnesses.

. v REULNALQD W. BUM).

Wii-nesses:

.\l. B. MAY,

A. L. F o sou.

